Simon Cowell mezhgan hussainy X Factor judges contestants Danni Monogue Louis Walsh

Simon Cowell, wife Mezhgan Hussainy and several other X Factor judges, including Danni Monogue and Louis Walsh were snapped at rehearsals in London yesterday, and everyone was in great spirits. Simon may be cranky with contestants when we see him on television, but judging from his thumbs up and warm smile, it seems like he's a pretty fun guy to work with!